Add wasm32 and wasm32-relaxed-simd targets

.cargo/config.toml

@@ -15,3 +15,15 @@ rustflags = ["-C", "target-cpu=native"]
 
 [target.x86_64-pc-windows-msvc]
 rustflags = ["-C", "target-cpu=native"]
+
+[target.wasm32-unknown-unknown]
+rustflags = [
+    "-C", "target-feature=+atomics,+bulk-memory,+simd128,+relaxed-simd",
+    "-C", "link-arg=--shared-memory",
+    "-C", "link-arg=--max-memory=1073741824",
+    "-C", "link-arg=--import-memory",
+    "-C", "link-arg=--export=__wasm_init_tls",
+    "-C", "link-arg=--export=__tls_size",
+    "-C", "link-arg=--export=__tls_align",
+    "-C", "link-arg=--export=__tls_base",
+]

.github/workflows/check_bench.yml

@@ -63,7 +63,7 @@ jobs:
         shell: bash
         run: |
           echo "RUSTFLAGS:" $RUSTFLAGS
-          cargo +nightly -Z target-applies-to-host rustc --release -- --emit link=reckless
+          cargo +nightly -Z target-applies-to-host rustc --release --bin reckless -- --emit link=reckless
           measured_bench=$("$SDE_PATH/sde" ${{ matrix.sde_flag }} -- ./reckless bench | tail -1 | cut "--delimiter= " -f 2 -)
           echo "measured_bench=$measured_bench" >> $GITHUB_ENV
           echo "Measured Bench: $measured_bench"

Cargo.toml

@@ -5,6 +5,9 @@ edition = "2024"
 build = "build/build.rs"
 publish = false
 
+[lib]
+crate-type = ["cdylib", "rlib"]
+
 [features]
 default = ["syzygy"]
 syzygy = []
@@ -26,3 +29,8 @@ bindgen = "0.71.1"
 
 [dependencies]
 libc = "0.2.175"
+web-time = "1"
+
+[target.'cfg(target_arch = "wasm32")'.dependencies]
+wasm-bindgen = "0.2"
+js-sys = "0.3"

Makefile

@@ -23,6 +23,15 @@ endif
 rule:
 	cargo rustc --release -- -C target-cpu=native --emit link=$(NAME)
 
+wasm:
+	unset RUSTFLAGS && rustup run nightly \
+		cargo build -Z build-std=panic_abort,std \
+		--lib --target wasm32-unknown-unknown --release --no-default-features
+	wasm-bindgen target/wasm32-unknown-unknown/release/reckless.wasm --target web --out-dir pkg
+	wasm-opt -O3 --enable-simd --enable-threads --enable-relaxed-simd \
+		pkg/reckless_bg.wasm -o pkg/reckless_bg.wasm
+
+
 x64-check:
 	RUSTFLAGS="-C target-cpu=x86-64" cargo check --target x86_64-unknown-linux-gnu --no-default-features
 	RUSTFLAGS="-C target-cpu=x86-64-v3" cargo check --target x86_64-unknown-linux-gnu --no-default-features

build/build.rs

@@ -20,7 +20,9 @@ fn main() {
     generate_engine_version();
 
     #[cfg(feature = "syzygy")]
-    generate_syzygy_binding();
+    if std::env::var("CARGO_CFG_TARGET_ARCH").as_deref() != Ok("wasm32") {
+        generate_syzygy_binding();
+    }
 
     if !Path::new("networks").join(NETWORK_NAME).exists() && env::var("EVALFILE").is_err() {
         download_network();

src/lib.rs

@@ -0,0 +1,45 @@
+#![allow(unsafe_op_in_unsafe_fn)]
+#![warn(clippy::large_types_passed_by_value)]
+#![warn(clippy::trivially_copy_pass_by_ref)]
+#![warn(clippy::redundant_clone)]
+#![cfg_attr(target_arch = "wasm32", allow(dead_code, unused_imports))]
+
+mod board;
+mod evaluation;
+mod history;
+mod lookup;
+mod misc;
+mod movepick;
+mod nnue;
+mod numa;
+mod parameters;
+mod search;
+mod setwise;
+mod stack;
+mod thread;
+mod threadpool;
+mod time;
+mod transposition;
+mod types;
+
+mod tools;
+
+#[cfg(not(target_arch = "wasm32"))]
+mod uci;
+
+#[cfg(feature = "syzygy")]
+mod tb;
+
+#[cfg(feature = "syzygy")]
+#[allow(warnings)]
+mod bindings;
+
+#[cfg(target_arch = "wasm32")]
+pub mod wasm;
+
+#[cfg(not(target_arch = "wasm32"))]
+pub fn run(buffer: std::collections::VecDeque<String>) {
+    lookup::initialize();
+    nnue::initialize();
+    uci::message_loop(buffer);
+}

src/main.rs

@@ -1,40 +1,5 @@
-#![allow(unsafe_op_in_unsafe_fn)]
-#![warn(clippy::large_types_passed_by_value)]
-#![warn(clippy::trivially_copy_pass_by_ref)]
-#![warn(clippy::redundant_clone)]
-
-mod board;
-mod evaluation;
-mod history;
-mod lookup;
-mod misc;
-mod movepick;
-mod nnue;
-mod numa;
-mod parameters;
-mod search;
-mod setwise;
-mod stack;
-mod thread;
-mod threadpool;
-mod time;
-mod tools;
-mod transposition;
-mod types;
-mod uci;
-
-#[cfg(feature = "syzygy")]
-mod tb;
-
-#[cfg(feature = "syzygy")]
-#[allow(warnings)]
-mod bindings;
-
+#[cfg(not(target_arch = "wasm32"))]
 fn main() {
-    lookup::initialize();
-    nnue::initialize();
-
-    let buffer: std::collections::VecDeque<String> = std::env::args().skip(1).collect();
-
-    uci::message_loop(buffer);
+    let buffer = std::env::args().skip(1).collect();
+    reckless::run(buffer);
 }